LC3:无重复字符的最长子串
双指针+滑动窗口
class Solution {
public:
int lengthOfLongestSubstring(string s) {
if(s.size() == 0) return 0;
unordered_set<char> lookup;
int maxStr = 0;
int left = 0;
for(int i = 0; i < s.size(); i++){
while (lookup.find(s[i]) != lookup.end()){
lookup.erase(s[left]);
left ++;
}
maxStr = max(maxStr,i-left+1);
lookup.insert(s[i]);
}
return maxStr;
}
};
作者:powcai
链接:https://leetcode-cn.com/problems/longest-substring-without-repeating-characters/solution/hua-dong-chuang-kou-by-powcai/
来源:力扣(LeetCode)
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